diff --git a/.github/workflows/cygwin-51x.yml b/.github/workflows/cygwin-51x.yml
index 0b219442..792dfd3a 100644
--- a/.github/workflows/cygwin-51x.yml
+++ b/.github/workflows/cygwin-51x.yml
@@ -7,6 +7,6 @@ jobs:
     uses: ./.github/workflows/common.yml
     with:
       runs_on: windows-latest
-      compiler: ocaml-variants.5.1.1~rc1+options+win
+      compiler: ocaml-variants.5.1.1+options+win
       cygwin: true
       timeout: 360
diff --git a/.github/workflows/linux-51x-32bit.yml b/.github/workflows/linux-51x-32bit.yml
index 7df54afb..8c45f38d 100644
--- a/.github/workflows/linux-51x-32bit.yml
+++ b/.github/workflows/linux-51x-32bit.yml
@@ -6,5 +6,5 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      compiler: 'ocaml-variants.5.1.1~rc1+options,ocaml-option-32bit'
+      compiler: 'ocaml-variants.5.1.1+options,ocaml-option-32bit'
       timeout: 240
diff --git a/.github/workflows/linux-51x-bytecode.yml b/.github/workflows/linux-51x-bytecode.yml
index 78c48a5d..496d149a 100644
--- a/.github/workflows/linux-51x-bytecode.yml
+++ b/.github/workflows/linux-51x-bytecode.yml
@@ -6,5 +6,5 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      compiler: 'ocaml-variants.5.1.1~rc1+options,ocaml-option-bytecode-only'
+      compiler: 'ocaml-variants.5.1.1+options,ocaml-option-bytecode-only'
       timeout: 240
diff --git a/.github/workflows/linux-51x-debug.yml b/.github/workflows/linux-51x-debug.yml
index 6724568b..71505db0 100644
--- a/.github/workflows/linux-51x-debug.yml
+++ b/.github/workflows/linux-51x-debug.yml
@@ -6,7 +6,7 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      compiler: 'ocaml-base-compiler.5.1.1~rc1'
+      compiler: 'ocaml-base-compiler.5.1.1'
       dune_profile: 'debug-runtime'
       runparam: 's=4096,v=0,V=1'
       timeout: 240
diff --git a/.github/workflows/linux-51x-fp.yml b/.github/workflows/linux-51x-fp.yml
index 2fb76dc1..d5e2489a 100644
--- a/.github/workflows/linux-51x-fp.yml
+++ b/.github/workflows/linux-51x-fp.yml
@@ -6,5 +6,5 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      compiler: 'ocaml-variants.5.1.1~rc1+options,ocaml-option-fp'
+      compiler: 'ocaml-variants.5.1.1+options,ocaml-option-fp'
       timeout: 240
diff --git a/.github/workflows/linux-51x.yml b/.github/workflows/linux-51x.yml
index a09deb9a..294c9166 100644
--- a/.github/workflows/linux-51x.yml
+++ b/.github/workflows/linux-51x.yml
@@ -6,4 +6,4 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      compiler: 'ocaml-base-compiler.5.1.1~rc1'
+      compiler: 'ocaml-base-compiler.5.1.1'
diff --git a/.github/workflows/macosx-51x.yml b/.github/workflows/macosx-51x.yml
index d71042f9..e20a497e 100644
--- a/.github/workflows/macosx-51x.yml
+++ b/.github/workflows/macosx-51x.yml
@@ -6,5 +6,5 @@ jobs:
   build:
     uses: ./.github/workflows/common.yml
     with:
-      compiler: 'ocaml-base-compiler.5.1.1~rc1'
+      compiler: 'ocaml-base-compiler.5.1.1'
       runs_on: 'macos-latest'
diff --git a/.github/workflows/mingw-51x-bytecode.yml b/.github/workflows/mingw-51x-bytecode.yml
index efcd97d9..e4ef4f8a 100644
--- a/.github/workflows/mingw-51x-bytecode.yml
+++ b/.github/workflows/mingw-51x-bytecode.yml
@@ -7,5 +7,5 @@ jobs:
     uses: ./.github/workflows/common.yml
     with:
       runs_on: windows-latest
-      compiler: ocaml-variants.5.1.1~rc1+options+win,ocaml-option-mingw,ocaml-option-bytecode-only
+      compiler: ocaml-variants.5.1.1+options+win,ocaml-option-mingw,ocaml-option-bytecode-only
       timeout: 240
diff --git a/.github/workflows/mingw-51x.yml b/.github/workflows/mingw-51x.yml
index 34699c87..ef9a8e50 100644
--- a/.github/workflows/mingw-51x.yml
+++ b/.github/workflows/mingw-51x.yml
@@ -7,5 +7,5 @@ jobs:
     uses: ./.github/workflows/common.yml
     with:
       runs_on: windows-latest
-      compiler: ocaml-variants.5.1.1~rc1+options+win,ocaml-option-mingw
+      compiler: ocaml-variants.5.1.1+options+win,ocaml-option-mingw
       timeout: 240